I did a month sabbatical for exercise, nutrition, and classes... even did clinical testing and 8 psychotherapy sessions and group therapy three times a week. I loved it and wish I could afford to do it again. It was a very beneficial time and worth every penny.
Some things stuck and have carried me a long way. But it was Structure House in Raleigh-Durham. It was actually for weight loss... I was a respiratory rehab and was stuffed full of steroids... they were kind to think out of the box for me. I was overweight, but not really as overweight as they usually provide services for.
But I'll tell you what I learned, I learned I'm open to learn about things and on my own, I'm willing to manage basic health things with a level of competency. It was a whole lot better than boot camp I can tell you that!